Thrust-bearing.



E. U. KETCHUM, THRUST BEARING APPLICATION FILED APR. 3,19%,

Q61, 1 4g Patented June 14, 1916.

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I Vdnmssa: liwemm Ernesiflkshzifl, J41MM c Kwm Ae gaw by E. C. KETOHUM.THRUST BEARING. APPLICATION F'ILBD APR.8,1909.

Patented June 14, 1910.

961,142&

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unwise-BEARING.

961 Lidtl.

Applicutiou til-3d April 3, 1909. Serial Bo. $87312.

To all whom it. may concern:

Be it known that I, ERNEST C. KETCHUM, a citizen of the United States ofAmerica, and a resident of Boston, in the county of Suffolk and State ofMassachusetts, have incertain new and useful Improvements rip-4H1.-Beariugu, of which the following is a spec :atiou.

This invention relates to thrust bearings and has 2r its object theproduction of a device this, class in which the friction between thevarious operating parts will be reduced to a minimum.

it consists in certain novel features of construction and arrangement ofparts. which will be .readily understood by reference to the descriptionof the drawings and to the ole 15$ hereinafter given.

- the drawings: Figure 1 represents a section of a thrust bearingembodying the features of this invention. Fig. 2 represents a sectionthrough the revoluble shaft thereof and showingin elevation the ballsupporting cage, the same being drawn to an enlarged scale.Fig.3.represcnts a/section of the same, the cutting plane being on line33 on 2, aud Fig. l represents a diagram showing the method of formingthe ball-supporting grooves.

Similar characters designate like parts throughout the several figuresof the drawings.

lo the drawings, 19 represents a revoluble shaft provided. with. aplurality of disk plates 11 which surround said shaft and are adapted tomove longitudinally therewith. They may be formed integral with saidshaft 10 or mounted thereon. These disk plates 11 are interposed betweenother plates 12 which surround said shaft 10 and are provided withvbearings 13 in which the revoluble shaft 1G is adapted to rotate. 12 aresecured to a framework 14 of any desired construction in such mannerthat any movement of said plates 12 longitudinally of said shaft 10 isprevented.

interposed between each dish plate 11 and the plate 15) adjacent theretois a ea c .15 in which is mounted a plurality of caring balls 16 at'difierent distances from the axis of acid. shaft 10, the preferredmanner of said. balisbeing in two rows coniris oi said revoluhle shaft16. 0 carries a plurality of step 9 one which is interposed F i i l d 16which P L centric to The platesextend beyond the outer face of the cagel5;

and bear against the flat face of one of the fixed plates 12 and againstthe inclined bear-p w. formed in the opposite faces of the disk platesuing surfaces of the concentric grooves 18 11. When any thrust occurs ineither direc- T tion, during the rotation of the revoluble shaft 10, itis taken up by means of the bearing balls lfiiucontact with the fixedplates 12, the contacting surfaces being reduced to a mini mum while atthe same time they extend over the entire surface of the plates owin tothe bearing balls being arranfged at di ferent distances from the axis 0said shaft in a plurality of concentric rows and retained 'inposit-ion'by means of the retaining cage 15. In order to further reduce-the frictional contact between the plates and the bearing balls, thegrooves cut into these plates are peculiarly formed with the innerbearing surface of each groove of a greater pitch than the outer bearingsurfaceof said groove. By this construction of the grooves 18, all dragis obviated in the bearing balls 16 while rotating about their axes, aswould be the case were the grooves 18 of ordinary V type owing to thedifi'erenoe in radii of the two points of contact of the bearin ballswith the bearing surfaces of sai grooves. As shown in Fig. 4 the innerbearing surface of the groove 18 is from it 3 while the outer bearingsurface of said groove is from B G, and it is'obvious that the angle ofthevarious grooves varies with the distance that the grooves are locatedv x vF designates the point ofoontact of the ball 16 with the outerbearing surface B C while G designates the point of contact with theinner bearing suriace A B and line H.

I designates the axis about which the balls 16 rotate during therotation of the shaft 10.

K designates the point of contact with the face of one of the fixedplates 12.

It is evident, therefore, that each bearing ball 16 has three points ofcontact upon the two plates 11 and 12 between which it is interposed,which is obviously of .icet ad vantage. in order that there should be nodrafk upon the bail 16 during the rotation of t e plate 11 about theaxis of the shaft 10 and during the rotation of ithdbsllitself i 013 (i.the pom be, pro iurtiona in uther words the contact points I bearing0211:; upon the bearing faces 01 t" gl'UOYQS 18 must be in :1conicalapex i which at the intersm out: w lick the bl'dl puirit of coma:i A. B is always 4 1 point (if (2011mm Fa face B C to the 1")02 :1Milan Hie axis of mi:

fliubie shaft 1 ing 0 .1% {groove the Men deern H s: designer :1 W011.

(hmvn i'hioug ii the comm JCS to the bearing surface B C W1" (:mitaetpoint K bearing against Liv the, plate 152. I T MIX. 1%? i'otaii e; tothe of throng, 1. the uircu wiii 1 the hearing:

K En ine A. P U

zmmner d9" of gmaier pit and (1e points themon j Wlii always be on a:pmnt F LS (If the revoluble aiming;

1 m in A an armin $16 if; he disianco that "Joints F G; are fi'om theaxis of the h G 021 die inner bearing Face in {L we he outer bearing@111- TT 1 ii of 30,

:utx: u m i: e of the 'nmii, the an rammed according (0 H10 M miaicdthe, 11mm. 036 um in i110.

has

then located right any in: rcmhible 1 Thurs the: line E. n

mum; of the intersection of 1 I- 1 h he will 10 111.65. the

the angles 0' 1 16 first Ziav 1e (,3 B is a beast juigment of d thepoint 01 0422:1104. i The bill] 16 then locamd 033. hm

; point F 2*; right 11G axis H I about Winch the LAP CHINL lit" believadG15: h hs npemtion and many advantages of the invention W111 be thaw 1ymidexstood 11mm the i oragoint.

na ling thus described my xii/"elation 1 claim:

a Qevice the class L'iescribeci, the ation with mvoluble shaft; of Wmplates, one of which moves langitudii any with saifi shaft While. theother is praveniefi fi'mn such longitudinal movement and 011% 'Jf whichis provided with a. phimiity of C1711061i'fi(3 grooves; a cage interpn Qfiwexrn said plates comprising m0 pl w as cured together, each havingplurality 05 openingstherethrough, and phu'iiiity 0'2 saeufl-sphmicaldepressions 0n its inner 1". intcmediate said zspenir -pi, said 099mm:and depressions" i eggisit-rfiig with apenizi and deprp binns in the0111 :1. giiiumiity of balls 11': saiCi opening mg brEj/Ohd the outerface 0f said piat and bearing upon the w 4115 of 82nd grooves (if m:plzite and the f1 L. face of the utimv plgi'fic; md 21 saparatm bail 1nhe cavity formed by L vpyosing depressions when the plates 0 said areassembled.

in device {if the class Geacriaad, h- 2 con bani Mien Wih & i'evoiuble 1it; 0.5 flutes, one 0f s'i'iiich moves lai'i itudinaiiy h said shaftWhile the ether is prevented )m. sum horizcntal amusement and. mug ofzich is provi'tiec'i with of con-- taxis grmves; a cage. l 0 :5 1r'hytes cen'qqrising t 1511, each having a piurnii viiruughzir'rzuigg'ad cm (1 and a T'iilllialitff' L 011-3 011 "its imuzz'iniermuiiate it the centers film-QUE in :1 h ii-ho cei imjs of theupenins on each 0pc Em and ussiuns regisgs and depreg- I pluraliiy ofbails eXbe-miing beyoi'irl the outer plates and bearing uyen g'groavesof mm plate and the 1% other plate; mid [L se'aamtor unity farmed by tvmoppesing when the plates of said cage are u sa d

